US1554583A

US1554583A - Apparatus

Info

Publication number: US1554583A
Authority: US
Publication date: 1925-09-22
Anticipated expiration: 1942-09-22

Description

Sept. 22, 1925. 1,554,583

V S. LAKE APPARATUS FOR MOLDING CONCRETE Filed May' 6. 1924 latented Sept. 22,;192'5. v

UNITED. STATES PATENT OFFICE.-

smon mxzjor umronn, comncrxcu'r.

1 arranuus 1 a momma concurs.

. Application filed lay 8,

To all whom it may concern: 7

Be it known that I, SIMON L AK11,a citizen of the United States, residing at Milford, in the county of New Haven and State of Connecticut, have invented a certain new and useful Improvement in Apparatus for Molding Concrete, of which the following is a full, clear, and exact description.

The object of this invention is to increase the effective capacity of a concrete molding plant without lncreasing the ground space occupied.

Under the present practice of concrete slabs and the like for bui din poses, especially where the slabs are 0 large sizes such as are used for walls, floors and purroofs, the slabs are cast or molded flat upon the ground and must remain in that position until they have acquired sufficient set to permit their removal without injury. Obviously, this is a time and s ace consuming operation and requires a arge area to afford anything in the, nature of quantity production.

The casting or molding of slabs in accordance with my invention permits successive superposition of the slabsas they are molded, thus multiplyin the effective capacity of a iven area 0 available ground and hence increasing production without increasing plant.

he invention consists in an apparatus for molding concrete, comprising essentially one or more, preferably two, beds or platforms upon which concrete slabs or the like may be cast in superposition, means associated with said platforms or beds and including a curtain ada ted to be interposed between a cast slab an one to be cast, means for adjusting saidcurtain vertically with respect to said beds or platforms, and means for withdrawing the curtain from between superposed slabs, as I will proceed now to explaln and finally claim.

In the accompanyin drawin s illustrating the invention, in t e severa fi res of which like parts are similarly des1gnated, Figure 1 is a side View of my apparatus. Fig. 2 is a plan view of same.

The apparatus comprises casting beds or platforms 1 and'2 and between the beds is arranged a roller 3 upon which is wound a. curtain 4 preferably of thin sheet steel. This roller is carried by a shaft 5 mounted in bearing blocks 6 arranged for vertical sliding adjustment upon guides 7 and adapted producing I 1024. Serial No. 711,419.

to be raised and lowered by screws 8 provided with hand wheels 9 by which they may be rotated. One end of the shaft 5 carries a worm wheel 10 meshed by a worm 11 rovided with an operating. crank 12, and by this gearing, or its operative equivalent, the curtain may be wound upon or unwound from its roller 3.

The beds or platforms 1 and 2 are preferably made hollow and may be heated by steam or other-suitable heating fluid introduced into and exhausted from them by means of

pipe connections

13 and 14.

When cored slabs are to be formed, steam or the like heated cores 15 may be used (Fig. 2). These cores may be, and referably are of the form shown and descri ed in my 00- ending) application, Serial N 0. 409,370, filed eptem or 10, 1920.

The operation of the device is as follows :Assuming that a slab 17 is to be cast upon the bed 1, the steel curtain is unwound from roller 3 sufliciently to stretch completeframework or elements, if same are used, are

properly positioned, and the cores are put in place. Then suitable forms are arranged at the ends of the cores and between the forms 16 and the mold thus formed is filled to the required amount and tamped and screeded. Steam or other heating fluid is then introduced into the bed and the cores and the drying of the thus formed slab hastened to the oint at which the concrete attains its initial set. The curtain may now be withdrawn, Without injury to the slab, by operating the gearing 10-11. The slab hav ing attained sufiicient hardness due to the setting of the concrete to bear considerable weight without injury, the roller 3 is raised by operation of thescrews 8 until it is at such a height that the curtain 4 will lie flat upon the top of the slab just formed, and the curtain is stretched over the slab and resting upon it. The curtain is now again be repeated to orm a number of superposed slabs, the number of same being determined b the height to which the curtain may. be elevated in its guides 7.

By providing two beds. 1 and 2 and a smle curtain 4, this curtain may do double duty in service on both beds, the casting operation being alternated between the two so that While a finished slab is being dried on one bed a fresh slab may be cast upon the other, thus doubling the output and avoiding dela s in casting.

hen the full complement of slabs has been cast upon each bed, each pile of slabs and its supporting bed may be covered with a tarpauhn, the heating of the beds and cores continued, and steam or moist warm air. introduced beneath the covering tarpaulin to complete the drying and curing of the slabs.

Obviously, if cored slabs are not to be formed, the whole form for the mold may be set up before, any concrete is poured, but I prefer to use the cores, not only because I thereby produce a better type of slab than the solid slab, but because 1; e heating of the concrete by means of the cores materially assists in attaining the desired setting of the concrete and thereby accelerates the process of casting and increases production.

In order that the curtain mechanism may not be idle when the full complement of slabs has been cast upon each bed, I may mount the beds upon rollers or wheels so that they may be removed and empty beds substituted for them, and casting resumed. Various other modifications and changes in the apparatus are contemplated as within the spirit of the invention and the scope of the following claims. What I claim is 1. In an apparatus for molding concrete,

a bed upon which concrete articles are to be cast in superposition, a separating curtain arranged for interposition between a cast article and an article to be cast in superposition thereon, and means for subjecting the superposed articles to the influence of heat, for the purpose specified.

2. In an apparatus for molding concrete, a molding bed, a curtain adapted to be stretched over said bed and to receive the concrete to form an article, and means for withdrawing said curtain from beneath the finished article.

3. In an apparatus formoldingconcrete, a molding bed, a curtain adapted to be stretch over an article a ing said bed, and means for withdrawing szlud curtain from beneath the finished artic e.

4. In an ap aratus for molding concrete, a molding bed u on which concrete articles are adapted to cast in superposition, a curtain adapted to be stretched over said bed and upon which concrete is deposited to form an article means for withdrawing said curtain from neath the finished article, andmeans for raising and lowering said curtain whereby it Ina; be positioned to read cast.

5. In an apparatus for mo ding concrete,

a pair of simllar beds, a curtain arranged between the same and adapted for cooperationwith each. alternately and upon which concrete is deposited to form an article, and means for withdrawin said curtain from beneath the finished article.

6. In an apparatus for molding concrete, :1. pair of similar beds upon which concrete articles are to be cast alternately in superposition, a curtain arranged between said beds and adapted for cooperation with each alternately and upon which concrete is deposited to form the articles, means for withdrawing said curtain from beneath the finished articles, and means for raising arid lowering said curtain for the purpose of interposing it between a cast article and an art cle to be cast ,in superposition upon it.

7. In an apparatus for molding concrete,

a molding bed, a flexible metallic curtain adapted to be stretched over said bed and to recewe concrete to form an article, and means for withdrawing said curtain from beneath the finished artlcle. I

8. In an apparatus for molding concrete, a molding bed upon which articles are to be cast in superposition, a flexible metallic curtain adapted to span said bed and to receive concrete to form an article, means for withdrawing said curtain from beneath the finished article, and means for raising and lowerin said curtainfor the purpose of positionlng it upon an article already cast to receive concrete for casting an article superposed thereon.

9. In an apparatus for molding concrete, a bed upon'which concrete articles are to be cast in superposition, a separating curtain arranged for interposition between a cast article and an article to be cast in superposition thereon, and means including heated cores for subjectin the superposed articles to the influence 0 heat, for the purpose specified.

In testimony whereof I have hereunto set myhand this 5th day of May, A. D. 1924:.

SIMON LAKE.